let g:mkdp_brower = '/usr/bin/firefox'
nmap <C-m> :MarkdownPreviewToggle <cr>
 au BufNewFile,BufRead *.md  :setlocal spell spell spelllang=en_us,cjk
let g:vim_markdown_math = 1 
let g:vim_markdown_folding_disabled = 1
let g:vim_markdown_fenced_languages = ['c++=cpp']
 
